Pulse Detonation Engine Fuel Supply System Design Studies

In this dissertation, the working process of fuel injection system for pulse detonation engine was analyzed and studied by means of system design and experimental research mainly. The main work reads as follows:(1) According to the characteristics of PDE intermittent work, the principle diagram of PDE fuel injection system was designed, with selection calculating the system components, and the PDE oil injection system was built successfully. Additionally, by the means of one-dimensional characteristics method on water hammer phenomenon theoretically verified that the system will not affect the intermittent supply and it was proved by the subsequent experiment. That means the system can meet the design objectives.(2) In the fuel injection system commissioning process, the regulation of fuel pressure and response time with the variation of N2 pressure and solenoid valve input current was investigated. Additionally, pressure response and frequency were compared under different PDE frequencies. The results show that increasing N2 pressure in accumulator can accelerate pressure response significantly and higher input current leads to quicker fuel pressure response. With the operating frequency increasing, the time to reach the expected fuel pressure gets longer.(3) Through the cold test, it verified that DDT enhanced devices not only reduce the ability of the process, and increase the total pressure loss, but also ultimately affect the overall engine performance. In the hot test, whether install the mixing equipment or not will directly affect the success of the engine ignition and the engine's detonation process. Trial lesson summary found that:it is easy to control the equivalence ratio near 1.1 and detonate detonation wave by regulating the supply system.